I'm working on my first screenplay, I'm kind of learning it all as I go along. There's a certain scene that I'm wanting to add, but I can't figure out how to format it and I don't know how to word it in the search.

Basically, there's a scene in which the main character is sitting at his desk writing in a journal, I want him to be narrating what he is writing so that the audience can know what it is. He will be writing, as the audience hears a voice over in a sense.